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PNEUMATIC TIRE.

No. 535,978. Patented Mar. 19, 1895.

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V UNITED STATES PATE T OF ICE.

GRANVILLE H. E. OOOKE, OF LONDON, ENGLAND.

PNEUMATIC TIRE.

SPECIFICATION forming part of Letters Patent No. 535,978, dated March19, 1 895.

Application filed December 11, 1894. Serial No. 5 31,537. (No model.)

To aZZ whom it mag concern.- v

Be it known that I, GRANVILLE HAWLEY EGERTON COOKE, a subject of theQueen of Great Britain and Ireland, and aresident of' Brunswick Square,in the city of London, England, have .inyented certain new and usefulImprovements in PneumaticTires; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

This invention for improvements in pneumatic tires relates to tireshaving an outer removable cover and an inner inflatable air tube, andhas for its object to render it impossible for the inflatable air tubeto get or become gripped or pinched between the sides of the rim and theedges of the outer cover when placing the outer cover in position and toget out of position when the outer cover is being removed; and consistsessentially in constructing the air tube so that normally it is held outfrom the bed of the rim or within the arch of the outer cover to whichit is applied.

In carrying this invention into practical effect the air tube is heldout or expanded by an elastic ring or circular body of larger diameterthan the normal mean diameter of the air tube, and placed within orsecured to the tube so that normally, the tube assumes more or less theshape of a flat ring. The ring or body may be of metal, cane or othersuitable rigid material or a small inflatable tube and may be a completeendless ring or an incomplete ring or a plain adjustablering or thewhole or a portion of the ring when made of wire may be in the form of ahelix or corrugated so that the diameter readily adjusts itsimilar viewsto Figs. 2 and 3 showing a Cooke tire fitted with the air tube, andFigs. 6 and 7 are similar views to Figs. 2 and 3 showing the Clinchertire fitted with the air tube.

The air tube a is fitted internally with an endless ring I) which holdsout or expands the tube a so that it assumes more or less the shape of aflat ring as shown in Figs. 3, 5, and 7. The air tube can be fitted bypassing the wire through an open ended air tube then securing the endsof the wire by brazing, soldering, bending together or by a right andleft screwed nipple and. finally the tube is stretched so that the endsof the tube overlap and the overlapping ends are cemented together.Preferably the diameter of the ring b when joined up is equal to theinternal diameter of the crown of the arch of the outer cover, that isthe diameter at 0, so that it cannot move about in the tube even whenthe 'tire is inflated. It is not necesary that the ends of the wire b befirmly fixed together but the ends must be protected so as not to injure the air tube and one end may slide in or on the other.

The tube a need not be stretched on the ring I) but be simply held outin a flabby condition by it. The object of the ring 1) is to insure thatthe air tube instead of lying in the bottom of the rim when deflated issuspended more or less in the arch of the outer cover. The wire need notbe an exact circle but can be corrugated or otherwise bent so as torender it more or less flexible in the direction of its'length.

When there is any danger of the wire I) rubbing against or damaging theinflatable tube means must be taken to provide against this as forexample by passing it through loops or tabs cemented on the inside ofthe tube so that it is suspended inside the tube,

when the tire is fully inflated.

This invention may be applied to tubes after they have been made upeither by passing the wire E) into the inside of the tube, or ifpreferred by attaching it to the outside in any convenient manner.

What I claim, and desire to secure by Letters Patent, is-

1. The combination with the air tube of a pneumatic tire of a ringadapted tosupport ICO the air tube within the arch of the outer coversubstantially as described.

2. In a pneumatic tire the combination with In testimony whereof I haveafiixed my Sig-- nature in presence of two witnesses.

an air tube and an outer cover of a ring GRANVILLE COOIXE' 5 adapted tosupport the air tube within the \Vitnesses:

arch of the outer cover substantially as de- J. W. MACKENZIE,

scribed.-

ALBERT JONES.

